Steering Angle-Guided Multimodal Fusion Lane Detection for Autonomous Driving

Lane detection is a critical part of autonomous driving technology. When difficult situations are encountered (i.e., adverse light, severe occlusion), the lane detection task is still challenging. However, previous methods strongly depend on the extracted image features and ignore other features. It is necessary to consider the information from other modalities to assist the model for lane detection, especially in the task of curved lane detection. In this paper, considering that the vehicle steering angle is closely related to the visual feature of lane lines, we propose a novel model named Image-Angle Fusion Network (IAFNet) to solve the lane detection problem by fusing vehicle steering angle features with image features. To make the steering angle features better match the image features, we use the tensor outer product to extend the dimensionality of the steering angle information. A lightweight Image-Angle cross-attention module (LIA-CAM) is proposed to learn the implicit relationship between steering angles and visual features of lane lines, aimed at improving the performance of our model in difficult situations. To guide the network to retain the correct steering angle information, we introduced regression prediction loss of steering angle. Besides, we also released a new dataset based on the Udacity dataset: ImageAngle-Udacity (IA-Udacity) dataset. Extensive experiments on the IA-Udacity dataset show that our method outperforms the current state-of-the-art methods showing both higher efficiency and accuracy. Code and data are available on https://github.com/gongyan1/LIA-CAM.